#!/bin/bash

{{/*
Copyright 2018 The Openstack-Helm Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/}}

set -ex
export LC_ALL=C

: "${ADMIN_KEYRING:=/etc/ceph/${CLUSTER}.client.admin.keyring}"
: "${OSD_TARGET_PGS:=100}"
: "${QUANTITY_OSDS:=15}"

if [[ ! -e /etc/ceph/${CLUSTER}.conf ]]; then
  echo "ERROR- /etc/ceph/${CLUSTER}.conf must exist; get it from your existing mon"
  exit 1
fi

if [[ ! -e ${ADMIN_KEYRING} ]]; then
   echo "ERROR- ${ADMIN_KEYRING} must exist; get it from your existing mon"
   exit 1
fi

if ! ceph --cluster "${CLUSTER}" osd crush rule ls | grep -q "^same_host$"; then
  ceph --cluster "${CLUSTER}" osd crush rule create-simple same_host default osd
fi

function create_pool () {
  POOL_APPLICATION=$1
  POOL_NAME=$2
  POOL_REPLICATION=$3
  POOL_PLACEMENT_GROUPS=$4
  POOL_CRUSH_RULE=$5
  if ! ceph --cluster "${CLUSTER}" osd pool stats "${POOL_NAME}" > /dev/null 2>&1; then
    ceph --cluster "${CLUSTER}" osd pool create "${POOL_NAME}" ${POOL_PLACEMENT_GROUPS}
    while [ $(ceph --cluster "${CLUSTER}" -s | grep creating -c) -gt 0 ]; do echo -n .;sleep 1; done
    if [ "x${POOL_NAME}" == "xrbd" ]; then
      rbd --cluster "${CLUSTER}" pool init ${POOL_NAME}
    fi
    ceph --cluster "${CLUSTER}" osd pool application enable "${POOL_NAME}" "${POOL_APPLICATION}"
  fi
  ceph --cluster "${CLUSTER}" osd pool set "${POOL_NAME}" size ${POOL_REPLICATION}
  ceph --cluster "${CLUSTER}" osd pool set "${POOL_NAME}" crush_rule "${POOL_CRUSH_RULE}"
}

function manage_pool () {
  POOL_APPLICATION=$1
  POOL_NAME=$2
  POOL_REPLICATION=$3
  TOTAL_OSDS=$4
  TOTAL_DATA_PERCENT=$5
  TARGET_PG_PER_OSD=$6
  POOL_CRUSH_RULE=$7
  POOL_PLACEMENT_GROUPS=$(/tmp/pool-calc.py ${POOL_REPLICATION} ${TOTAL_OSDS} ${TOTAL_DATA_PERCENT} ${TARGET_PG_PER_OSD})
  create_pool "${POOL_APPLICATION}" "${POOL_NAME}" "${POOL_REPLICATION}" "${POOL_PLACEMENT_GROUPS}" "${POOL_CRUSH_RULE}"
}

{{ $targetNumOSD := .Values.conf.pool.target.osd }}
{{ $targetPGperOSD := .Values.conf.pool.target.pg_per_osd }}
{{ $crushRuleDefault := .Values.conf.pool.default.crush_rule }}
{{- range $pool := .Values.conf.pool.spec -}}
{{- with $pool }}
manage_pool {{ .application }} {{ .name }} {{ .replication }} {{ $targetNumOSD }} {{ .percent_total_data }} {{ $targetPGperOSD }} {{ $crushRuleDefault }}
{{- end }}
{{- end }}

{{- if .Values.conf.pool.crush.tunables }}
ceph --cluster "${CLUSTER}" osd crush tunables {{ .Values.conf.pool.crush.tunables }}
{{- end }}